<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>

</head>
<body>

    <div id="app">
        <button v-on:click="click">haha</button>
        <div v-on:mouseenter="mouseenter">jiji</div>
    </div>

    <script>
        var app=new Vue({
            el:"#app",
            methods:{
                click:function b(params) {
                    console.log("gagag")
                },
                mouseenter:function asdas(){
                    console.log("move")
                }
            }
        })
    </script>
</body>
</html>